Hacking into baby monitor

Today I was at my gf house and her lo was upstairs for a nap. While we were siting watching tv we heard a mans voice on the monitor, it was so quick that we freaked out and ran upstairs to get lo. I don't think it's a haunting thing but I do remember reading about that guy who hacked a baby monitor in Texas.
Would you ladies buy a new monitor or just unplug the one you have. It freaked me outdo bad I came home and unplugged my own monitor.

I have heard this can happen a lot. Especially if someone near by has the same monitor. It can pic up their monitor. It's creepy if you ask me. I want to get one but posts like this make me not want to. Her room is close to our room. But far away from the living room, so I just have her nap in the living room with me in there.

Audio monitors are radio frequncy based so transmission gets interrupted sometimes. Ours picked up our neighbor's baby crying. My in laws were home and knew we took the baby with us, so they panicked because they thought we forgot the baby. Lol.

In the past my baby monitors would pick up peoples telephone calls or other monitors. It would be scare the crap out of me at night when I would hear a person's voice through the monitor and then realize it was just someone's telephone call.

I'd start by changing the channel. If someone nearby has the same and on the same channel it will keep happening. As long as there isn't more than one house nearby using that monitor (or i suppose the same house that has two monitors but whatever. .) I think that would fix it..

I might be wrong but I thin k the lady who was talking about hers actually getting hacked was using a video one. Pretty sure it was the kind where you can see it on your phone, computer etc and used Wi-Fi..that's why it was able to be accessed by someone else intentionally.